Homogeneous Nucleation in Supersaturated Vapors of n-Nonane

1994 ◽  
Vol 59 (2) ◽  
pp. 253-261 ◽  
Author(s):  
Vladimír Ždímal ◽  
Jiří Smolík ◽  
Ivo G. N. Meijer
Keyword(s):  
Surface Tension ◽  
Theoretical Prediction ◽  
Thermal Diffusion ◽  
Homogeneous Nucleation ◽  
Reasonable Agreement ◽  
Cloud Chamber ◽  
Temperature Dependent ◽  
Significant Underestimation

The upward thermal diffusion cloud chamber was used to measure the supersaturations of n-nonane vapors required to cause an observed rate of homogeneous nucleation of 1 droplet/cm3 s. New temperature-dependent correlations for the surface tension and the density of n-nonane have been applied in theoretical prediction of the corresponding supersaturation. The measurements are found to be in reasonable agreement with the predictions of the classical (Becker-Doering) theory whereas both the Dillmann-Meier and the Girshick-Chiu theories lead to a significant underestimation of supersaturation in the whole range of temperatures measured.

Condensation of supersaturated vapours. Homogeneous nucleation of naphthalene and phthalic anhydride

1985 ◽  
Vol 50 (6) ◽  
pp. 1349-1358 ◽  
Author(s):  
Jiří Smolík ◽  
Jaroslav Vítovec
Keyword(s):  
Surface Tension ◽  
Thermal Diffusion ◽  
Classical Theory ◽  
Phthalic Anhydride ◽  
Homogeneous Nucleation ◽  
Corresponding States ◽  
Experimental Results ◽  
Critical Supersaturation ◽  
Fluid Behaviour ◽  
Good Agreement

The critical supersaturation required for the homogeneous nucleation of naphthalene and phthalic anhydride from their vapours has been measured using upward thermal diffusion cloud chamber. The results obtained are compared with the predictions of the classical theory of homogeneous nucleation (Volmer-Becker-Doring-Zeldovich) and the corresponding states correlation of homogeneous nucleation. The classical theory is found to be in excellent agreement with the experimental results on naphthalene but overpredicts the critical supersaturation of phthalic anhydride vapours by about 30%. In order to fit the experiment and theory, the new values of surface tension of phthalic anhydride were recalculated from the theory. Critical supersaturation of naphthalene plotted versus temperature reveals the same regular departure from single fluid behaviour as found for alkylbenzenes. The experimental results on phthalic anhydride were found to be in very good agreement with the corresponding states correlation.

Homogeneous nucleation rates of n-pentanol measured in an upward thermal diffusion cloud chamber

1999 ◽  
Vol 111 (8) ◽  
pp. 3623-3629 ◽  
Author(s):  
Markus M. Rudek ◽  
Joseph L. Katz ◽  
Igor V. Vidensky ◽  
Vladimir Ždı́mal ◽  
Jiri Smolı́k
Keyword(s):  
Thermal Diffusion ◽  
Homogeneous Nucleation ◽  
Cloud Chamber
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